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Arte-miy333 [17]
3 years ago
6

Why do we believe that most of the mass of the milky way is in the form of dark matter?

Physics
1 answer:
Nataliya [291]3 years ago
7 0
<h2>Answer:</h2>

Dark matter is a type of matter, whose composition is unknown and which corresponds to 80% of the matter in the universe. Its name refers to the fact it does not emit or interact with any type of electromagnetic radiation, being completely transparent throughout the electromagnetic spectrum.

However, it interacts with the known matter through <u>gravity</u>.

In this sense, it is believed that the Milky Way has 90% dark matter and only 10% ordinary matter (known matter). Because, like gravity, dark matter can not be observed directly, however its existence is inferred through the movement of the stars and the cosmic dust within the galaxy.

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Where and when does the sun stay up for 24hours
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Answer:

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Explanation:

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2 years ago
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I am going to say

C.  Energy contained in the nucleus of an atom

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The heat energy gained by the water in one minute is ?
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3 years ago
If it takes a ball dropped from rest 2.261 s to fall to the ground, from what height H was it released? Express your answer in m
algol [13]

Answer:

Height, H = 25.04 meters

Explanation:

Initially the ball is at rest, u = 0

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H=ut+\dfrac{1}{2}at^2

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H=\dfrac{1}{2}gt^2            

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H = 25.04 meters

So, the ball is released form a height of 25.04 meters. Hence, this is the required solution.

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